483 lines
15 KiB
C
483 lines
15 KiB
C
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is libguac-client-rdp.
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*
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* The Initial Developer of the Original Code is
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* Michael Jumper.
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* Portions created by the Initial Developer are Copyright (C) 2011
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Matt Hortman
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* Jocelyn DELALANDE <j.delalande@ulteo.com> Ulteo SAS - http://www.ulteo.com
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*
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* Portions created by Ulteo SAS employees are Copyright (C) 2012 Ulteo SAS
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <pthread.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/select.h>
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#include <errno.h>
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#include <freerdp/freerdp.h>
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#include <freerdp/channels/channels.h>
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#include <freerdp/input.h>
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#include <freerdp/codec/color.h>
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#include <freerdp/cache/cache.h>
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#include <freerdp/utils/event.h>
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#ifdef HAVE_FREERDP_CLIENT_CLIPRDR_H
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#include <freerdp/client/cliprdr.h>
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#else
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#include "compat/client-cliprdr.h"
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#endif
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#ifdef ENABLE_WINPR
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#include <winpr/wtypes.h>
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#else
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#include "compat/winpr-wtypes.h"
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#endif
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#include <guacamole/socket.h>
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#include <guacamole/protocol.h>
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#include <guacamole/client.h>
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#include <guacamole/error.h>
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#include "client.h"
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#include "rdp_keymap.h"
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#include "rdp_cliprdr.h"
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#include "guac_handlers.h"
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void __guac_rdp_update_keysyms(guac_client* client, const int* keysym_string, int from, int to);
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int __guac_rdp_send_keysym(guac_client* client, int keysym, int pressed);
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int rdp_guac_client_free_handler(guac_client* client) {
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rdp_guac_client_data* guac_client_data =
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(rdp_guac_client_data*) client->data;
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freerdp* rdp_inst = guac_client_data->rdp_inst;
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rdpChannels* channels = rdp_inst->context->channels;
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/* Clean up RDP client */
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freerdp_channels_close(channels, rdp_inst);
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freerdp_channels_free(channels);
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freerdp_disconnect(rdp_inst);
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freerdp_clrconv_free(((rdp_freerdp_context*) rdp_inst->context)->clrconv);
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cache_free(rdp_inst->context->cache);
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freerdp_free(rdp_inst);
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/* Free client data */
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cairo_surface_destroy(guac_client_data->opaque_glyph_surface);
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cairo_surface_destroy(guac_client_data->trans_glyph_surface);
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free(guac_client_data->clipboard);
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free(guac_client_data);
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return 0;
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}
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int rdp_guac_client_handle_messages(guac_client* client) {
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rdp_guac_client_data* guac_client_data = (rdp_guac_client_data*) client->data;
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freerdp* rdp_inst = guac_client_data->rdp_inst;
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rdpChannels* channels = rdp_inst->context->channels;
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int index;
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int max_fd, fd;
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void* read_fds[32];
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void* write_fds[32];
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int read_count = 0;
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int write_count = 0;
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fd_set rfds, wfds;
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wMessage* event;
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struct timeval timeout = {
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.tv_sec = 0,
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.tv_usec = 250000
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};
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/* Get RDP fds */
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if (!freerdp_get_fds(rdp_inst, read_fds, &read_count, write_fds, &write_count)) {
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guac_error = GUAC_STATUS_BAD_STATE;
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guac_error_message = "Unable to read RDP file descriptors";
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return 1;
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}
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/* Get channel fds */
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if (!freerdp_channels_get_fds(channels, rdp_inst, read_fds, &read_count, write_fds, &write_count)) {
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guac_error = GUAC_STATUS_BAD_STATE;
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guac_error_message = "Unable to read RDP channel file descriptors";
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return 1;
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}
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/* Construct read fd_set */
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max_fd = 0;
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FD_ZERO(&rfds);
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for (index = 0; index < read_count; index++) {
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fd = (int)(long) (read_fds[index]);
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if (fd > max_fd)
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max_fd = fd;
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FD_SET(fd, &rfds);
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}
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/* Construct write fd_set */
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FD_ZERO(&wfds);
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for (index = 0; index < write_count; index++) {
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fd = (int)(long) (write_fds[index]);
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if (fd > max_fd)
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max_fd = fd;
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FD_SET(fd, &wfds);
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}
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/* If no file descriptors, error */
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if (max_fd == 0) {
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guac_error = GUAC_STATUS_BAD_STATE;
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guac_error_message = "No file descriptors";
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return 1;
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}
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/* Otherwise, wait for file descriptors given */
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if (select(max_fd + 1, &rfds, &wfds, NULL, &timeout) == -1) {
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/* these are not really errors */
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if (!((errno == EAGAIN) ||
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(errno == EWOULDBLOCK) ||
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(errno == EINPROGRESS) ||
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(errno == EINTR))) /* signal occurred */
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{
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guac_error = GUAC_STATUS_SEE_ERRNO;
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guac_error_message = "Error waiting for file descriptor";
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return 1;
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}
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}
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do {
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pthread_mutex_lock(&(guac_client_data->rdp_lock));
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/* Check the libfreerdp fds */
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if (!freerdp_check_fds(rdp_inst)) {
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guac_error = GUAC_STATUS_BAD_STATE;
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guac_error_message = "Error handling RDP file descriptors";
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pthread_mutex_unlock(&(guac_client_data->rdp_lock));
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return 1;
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}
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/* Check channel fds */
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if (!freerdp_channels_check_fds(channels, rdp_inst)) {
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guac_error = GUAC_STATUS_BAD_STATE;
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guac_error_message = "Error handling RDP channel file descriptors";
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pthread_mutex_unlock(&(guac_client_data->rdp_lock));
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return 1;
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}
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/* Check for channel events */
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event = freerdp_channels_pop_event(channels);
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if (event) {
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/* Handle clipboard events */
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#ifdef LEGACY_EVENT
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if (event->event_class == CliprdrChannel_Class)
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guac_rdp_process_cliprdr_event(client, event);
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#else
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if (GetMessageClass(event->id) == CliprdrChannel_Class)
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guac_rdp_process_cliprdr_event(client, event);
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#endif
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freerdp_event_free(event);
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}
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/* Handle RDP disconnect */
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if (freerdp_shall_disconnect(rdp_inst)) {
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guac_error = GUAC_STATUS_NO_INPUT;
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guac_error_message = "RDP server closed connection";
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pthread_mutex_unlock(&(guac_client_data->rdp_lock));
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return 1;
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}
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/* Flush any audio */
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if (guac_client_data->audio != NULL)
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guac_socket_flush(guac_client_data->audio->stream->socket);
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/* Reset timeout to 0 seconds */
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timeout.tv_sec = 0;
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timeout.tv_usec = 0;
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/* Construct read fd_set */
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max_fd = 0;
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FD_ZERO(&rfds);
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for (index = 0; index < read_count; index++) {
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fd = (int)(long) (read_fds[index]);
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if (fd > max_fd)
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max_fd = fd;
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FD_SET(fd, &rfds);
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}
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/* Construct write fd_set */
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FD_ZERO(&wfds);
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for (index = 0; index < write_count; index++) {
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fd = (int)(long) (write_fds[index]);
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if (fd > max_fd)
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max_fd = fd;
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FD_SET(fd, &wfds);
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}
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pthread_mutex_unlock(&(guac_client_data->rdp_lock));
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} while (select(max_fd + 1, &rfds, &wfds, NULL, &timeout) > 0);
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/* Success */
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return 0;
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}
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int rdp_guac_client_mouse_handler(guac_client* client, int x, int y, int mask) {
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rdp_guac_client_data* guac_client_data = (rdp_guac_client_data*) client->data;
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freerdp* rdp_inst = guac_client_data->rdp_inst;
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pthread_mutex_lock(&(guac_client_data->rdp_lock));
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/* If button mask unchanged, just send move event */
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if (mask == guac_client_data->mouse_button_mask)
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rdp_inst->input->MouseEvent(rdp_inst->input, PTR_FLAGS_MOVE, x, y);
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/* Otherwise, send events describing button change */
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else {
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/* Mouse buttons which have JUST become released */
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int released_mask = guac_client_data->mouse_button_mask & ~mask;
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/* Mouse buttons which have JUST become pressed */
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int pressed_mask = ~guac_client_data->mouse_button_mask & mask;
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/* Release event */
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if (released_mask & 0x07) {
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/* Calculate flags */
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int flags = 0;
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if (released_mask & 0x01) flags |= PTR_FLAGS_BUTTON1;
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if (released_mask & 0x02) flags |= PTR_FLAGS_BUTTON3;
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if (released_mask & 0x04) flags |= PTR_FLAGS_BUTTON2;
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rdp_inst->input->MouseEvent(rdp_inst->input, flags, x, y);
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}
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/* Press event */
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if (pressed_mask & 0x07) {
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/* Calculate flags */
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int flags = PTR_FLAGS_DOWN;
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if (pressed_mask & 0x01) flags |= PTR_FLAGS_BUTTON1;
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if (pressed_mask & 0x02) flags |= PTR_FLAGS_BUTTON3;
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if (pressed_mask & 0x04) flags |= PTR_FLAGS_BUTTON2;
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if (pressed_mask & 0x08) flags |= PTR_FLAGS_WHEEL | 0x78;
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if (pressed_mask & 0x10) flags |= PTR_FLAGS_WHEEL | PTR_FLAGS_WHEEL_NEGATIVE | 0x88;
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/* Send event */
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rdp_inst->input->MouseEvent(rdp_inst->input, flags, x, y);
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}
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/* Scroll event */
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if (pressed_mask & 0x18) {
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/* Down */
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if (pressed_mask & 0x08)
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rdp_inst->input->MouseEvent(
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rdp_inst->input,
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PTR_FLAGS_WHEEL | 0x78,
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x, y);
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/* Up */
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if (pressed_mask & 0x10)
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rdp_inst->input->MouseEvent(
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rdp_inst->input,
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PTR_FLAGS_WHEEL | PTR_FLAGS_WHEEL_NEGATIVE | 0x88,
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x, y);
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}
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guac_client_data->mouse_button_mask = mask;
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}
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pthread_mutex_unlock(&(guac_client_data->rdp_lock));
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return 0;
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}
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int __guac_rdp_send_keysym(guac_client* client, int keysym, int pressed) {
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rdp_guac_client_data* guac_client_data = (rdp_guac_client_data*) client->data;
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freerdp* rdp_inst = guac_client_data->rdp_inst;
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/* If keysym can be in lookup table */
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if (GUAC_RDP_KEYSYM_STORABLE(keysym)) {
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/* Look up scancode mapping */
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const guac_rdp_keysym_desc* keysym_desc =
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&GUAC_RDP_KEYSYM_LOOKUP(guac_client_data->keymap, keysym);
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/* If defined, send event */
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if (keysym_desc->scancode != 0) {
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pthread_mutex_lock(&(guac_client_data->rdp_lock));
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/* If defined, send any prerequesite keys that must be set */
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if (keysym_desc->set_keysyms != NULL)
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__guac_rdp_update_keysyms(client, keysym_desc->set_keysyms, 0, 1);
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/* If defined, release any keys that must be cleared */
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if (keysym_desc->clear_keysyms != NULL)
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__guac_rdp_update_keysyms(client, keysym_desc->clear_keysyms, 1, 0);
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/* Send actual key */
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rdp_inst->input->KeyboardEvent(
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rdp_inst->input,
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keysym_desc->flags
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| (pressed ? KBD_FLAGS_DOWN : KBD_FLAGS_RELEASE),
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keysym_desc->scancode);
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/* If defined, release any keys that were originally released */
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if (keysym_desc->set_keysyms != NULL)
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__guac_rdp_update_keysyms(client, keysym_desc->set_keysyms, 0, 0);
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/* If defined, send any keys that were originally set */
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if (keysym_desc->clear_keysyms != NULL)
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__guac_rdp_update_keysyms(client, keysym_desc->clear_keysyms, 1, 1);
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pthread_mutex_unlock(&(guac_client_data->rdp_lock));
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return 0;
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}
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}
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/* Fall back to unicode events if undefined inside current keymap */
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/* Only send when key pressed - Unicode events do not have
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* DOWN/RELEASE flags */
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if (pressed) {
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/* Translate keysym into codepoint */
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int codepoint;
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if (keysym <= 0xFF)
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codepoint = keysym;
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else if (keysym >= 0x1000000)
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codepoint = keysym & 0xFFFFFF;
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else {
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guac_client_log_info(client,
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"Unmapped keysym has no equivalent unicode "
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"value: 0x%x", keysym);
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return 0;
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}
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pthread_mutex_lock(&(guac_client_data->rdp_lock));
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/* Send Unicode event */
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rdp_inst->input->UnicodeKeyboardEvent(
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rdp_inst->input,
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0, codepoint);
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pthread_mutex_unlock(&(guac_client_data->rdp_lock));
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}
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return 0;
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}
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void __guac_rdp_update_keysyms(guac_client* client, const int* keysym_string, int from, int to) {
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rdp_guac_client_data* guac_client_data = (rdp_guac_client_data*) client->data;
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int keysym;
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/* Send all keysyms in string, NULL terminated */
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while ((keysym = *keysym_string) != 0) {
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/* Get current keysym state */
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int current_state = GUAC_RDP_KEYSYM_LOOKUP(guac_client_data->keysym_state, keysym);
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/* If key is currently in given state, send event for changing it to specified "to" state */
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if (current_state == from)
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__guac_rdp_send_keysym(client, *keysym_string, to);
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/* Next keysym */
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keysym_string++;
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}
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}
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int rdp_guac_client_key_handler(guac_client* client, int keysym, int pressed) {
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rdp_guac_client_data* guac_client_data = (rdp_guac_client_data*) client->data;
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/* Update keysym state */
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if (GUAC_RDP_KEYSYM_STORABLE(keysym))
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GUAC_RDP_KEYSYM_LOOKUP(guac_client_data->keysym_state, keysym) = pressed;
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return __guac_rdp_send_keysym(client, keysym, pressed);
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}
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int rdp_guac_client_clipboard_handler(guac_client* client, char* data) {
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rdpChannels* channels =
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((rdp_guac_client_data*) client->data)->rdp_inst->context->channels;
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RDP_CB_FORMAT_LIST_EVENT* format_list =
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(RDP_CB_FORMAT_LIST_EVENT*) freerdp_event_new(
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CliprdrChannel_Class,
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CliprdrChannel_FormatList,
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NULL, NULL);
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/* Free existing data */
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free(((rdp_guac_client_data*) client->data)->clipboard);
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/* Store data in client */
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((rdp_guac_client_data*) client->data)->clipboard = strdup(data);
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/* Notify server that text data is now available */
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format_list->formats = (UINT32*) malloc(sizeof(UINT32));
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format_list->formats[0] = CB_FORMAT_TEXT;
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format_list->num_formats = 1;
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freerdp_channels_send_event(channels, (wMessage*) format_list);
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return 0;
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}
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